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How much damping on suspended ceiling to fix 50Hz
Old 2nd June 2020
  #1
How much damping on suspended ceiling to fix 50Hz

Hey,

my drum room is about is about 3.5m high with a suspended ceiling something like 70cm below. All walls are drywall, only one side has concrete behind. Size is about 40mΒ². The ceiling gives me a nasty resonance at 49Hz. How much (as in thicknes) Rockwool or the like would I need to put on top of the ceiling boards (the usual stuff with holes) to get that under control?

Cheers, Peer
Old 3 weeks ago
  #2
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It depends on what treatment the room has, not only on the ceiling. I would question whether ceiling tiles with holes have a Noise Reduction Coefficient of 0.7 or higher.
Old 3 weeks ago
  #3
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Quote:
Originally Posted by PeerSoe View Post
Hey,

my drum room is about is about 3.5m high with a suspended ceiling something like 70cm below. All walls are drywall, only one side has concrete behind. Size is about 40mΒ². The ceiling gives me a nasty resonance at 49Hz. How much (as in thicknes) Rockwool or the like would I need to put on top of the ceiling boards (the usual stuff with holes) to get that under control?

Cheers, Peer
hello,

an empirical rule says: a wool with a flow resistivity 5000 Pa.s/m2 and 50 cm thick have an alfa (absorption) of 0.5 at 50 Hz
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